Single-compound-key type-writer.



D. JANKOWER.

SINGLE COMPOUND KEY TYPE WRITER.

APPLICATION FILED FEB. 14. I918.

Patented Apr. 22,1919. 3SHEETSSHEET1 D. JANKOWER..

SI'NGBLE COMPOUND K'EY TYPE WRITER.

APPLICATION FILED FEB. 14. ms.

Patented Apr. 22, 1919.

3 SHEETS-SHEET 2.

D. JANKOWER.

SINGLE COMPOUND KEY TYPE WRITER.

APPLICATION FILED FEB. 14, I918.

3 SHEETS-SHEET 3.

I 1,3611 ,4%% Patented Apr. 22, 1919.

Fig 3 5 woe-nice ATEN non.

SINGLE-CO t1? POUND-KEY TYPE-WRITER.

aaonaaa.

Specification of Letters IPatent.

Patented Apr. 22, 13319).

Application filed February it, me. Serial No. emcee.

To all whom it may concern:

Be it known that 1, DAVID JANKownn, a citizen of the United States, and resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Single- Gompound-Key Type-Writers, of which the following is a specification.

The subject of this invention is a typewriter that is operated in a similar manner to that of the ordinary key-board instrument; namely, by pressing the finger on any individual visual character and thereby rinting a corresponding character on paper. t diflers from the key-board instrument however in having only a single compoundkey instead of the many individual keys with their connecting and operating parts necessary in that class of typewriters.

The single key, referred to in the present invention, consists of a circular plate universally supported and having visual characters (letters of the alphabet, etc.) around its outer edge, which characters, although they all move when any individual one is pressed down, do not bring their corresponding printing characters in contact with the paper-the individual character only that is pressed upon having its corresponding character printed.

The single key-plate, used in the present case, through dispensing with the many individually moving'keys, and their multitude of connections common to the ordinary keyboard instrument, allows of a great saving in the cost ofmanufacture and a general simplification in construction, as will be seen by an examination of the accompanying partially diagrammatic drawings, of which Figure 1, is a plan view, with central cap removed; Fig. 2, a front vertical view, partially in section, of the main parts of Fig. 1; Fig. 3, a vertical cross-section, through dotted line Z, Z, of Fig. 1; Fig. 4, a modification of the universal movement shown in Fig. 1; Fig. 5-, a detail of the rod and pawl operating the paper carrier; Fig. 6, plan view of key-plate 2, with leveling springs under neath. Similar numerals refer to similar parts throughout the difierent views.

Referring now to Fig. 1: 2, is a hey-plate, with its central cap removed; 3, curved bar, integral with base 1; 4, horizontal extension of bar 3; 5, ball rigidly connected to bar 4-, and serving as a central support for the universal movement of which key-plate :2 forms a part; .6, ring freely pivoted to ball 5; 7, pivots connecting ring 6 to ball 5; S, pivot pins connected to cylinder 20 and servmg to pivot cylinder 20 to ring 6, the pivots being at right angles to pivots 7; 9, points of pins contacting with-ring 6-; 10, partially punched-out section of key-plate 2, opposite to the letter L and twisted underneath the said key-plate 2 so as to be in a direct line with the center of the said letter L and its corresponding printing letter L (see 11 in Fig. 2) 12, paper carrier; 13 teeth on turned-up edge of paper carrier 12; 14, guides for paper carrier 12; 15, shaft for paper feed; 16, rubber rolls on said shaft;

17, bearings for shaft; 18, handle for moving paper forward; 19,rod for word spacing; 21, opening in key-plate 2, through which spacing rod 19, protrudes.

In operatin ments and com inations that take now be explained.

Supposing that. the letter L is the beginning of a word; the finger is placed in the saucer-shaped depression on which the letter is printed and a downward pressure exerted; this causes the outer'edge of the keyplate nearest to the said letter L to move in the arc of a circle (see dotted curved line in Fig. 2) until the lower point of the blade 10 comes into contact with the lowest part (29) of the ii-shaped slot 23 at the right hand side of cylinder 22; the blade 10 is locked at this point, as far as its curved movement is concerned, by reason of the cylinder 22 being confined to a vertical motion by rod 19 which passes through an opening in the bottom of frame of the said cylinder 22 and also through an opening in the horizontal stationary bar 4 which serves to hold it in a vertical position; with the blade 1() looked as described at point 39 (see dotted lines for angle of blade 10.while in this position) the printing character 1L (numbered 11) at the bottom of cylinder 20, in line with place will the instrument, the movethelarge L on the key-plate 2, has swung thrdugh which is. the center, to point 40 (Fig. 2) as indicated by arrow; the pressure of the finger on-the letter L of key-plate 2 being continued, the cylinder 22 is forced downward against the pressure of spring 26 in socket (Fig. 3) and carries with it rod 24 (to which it is permanently secured at 32), to the top of which is pivotally connected ring 6 and cylinder'20; it (cylinder 22) also carr-ies downward spacing rod 19, by means of the bottom of said cylinder 22 coming in contact withpin 38 of said rod 19 against the light pressure of spring 35, until the pawl (Figs. 3 and 5) has contacted with the teeth 13 and moved the paper carrier 12 the distance of one letter to the right; the continued pressure of thefinger on letter L of key-plate 2 being maintained the printing character L (numbered 11) at the bottom of the cylinder 20 is brought into contact with the paper 33 and impressed upon the same, after which the various parts resume their normal position ready for the next letter to be printed by following the same motions as above described.

When a word has been printed, a space on the paper is left between it and the beginning of the following word by pressingdown rod 19, thereby making'the pawl 30 contact with teeth 13'of the paper carrier 12 and moving it one space. The opening 21 in key-plate 2 through which rod 19 passes is made large enough to clear the rod when the said key-plate is tilted out of its normal position, but when the tilting motion is stop- {ped by the blade 10 contacting with the bottom of downward vertical motion of the entire universal movement takes place, the rod 19 is also brought downward by the bottom of cylinder 22 pressing on pin 38 secured to the said rod 19 and thereby bringin the pawl 30 into connection with teeth 13 o the paper carrier 12. c

The cylinder 20 is cut away for the purpose of allowing enough space for the interiormechanism without conflicting with the free swing of the said cylinder 20, as well as for reducing its weight.

Rod 19, which by means of the pawl 30 at its lower end, serves to give a side motion I to the paper when the said pawl 30 contacts with the teeth 13 of the rear turned-up edge of'the paper-carrier 12 also serves by passing through the guide opening in frame 31 of cylinder 22 to confine the said cylinder 22 to a vertical movement only.

Pivots 7 and 9, forming part of the universal movement, prevent any lateral motion of key-plate, confining it entirely to a tilting motion until the character. to be printed reaches point 40 (see arrow in Fig. 2), when the arc of a circle, the ball 5 of.

is released it regains its ,1- and 2) is shown on the V slot 23 of cylinder 22, and a theentire universal movement partakes of a downward vertical motion until the typecharacter in position for printing'has been imressed on the paper.

ormally the cylinder gravity, retains a verticalv position and the, key-plate 2a horizontal one until any part of the said key-plate 2 is moved downward after which, when the pressure of the finger original position. To hasten the return action, a system of springs (41, in Fig.6) ,-may be used.

20, by means of- For clearness of explanation only a few ll-shaped slots (23 in Fig. 2) in cylinder 22 are shown but it is understood that there is an individual ll-shaped slotin the said cylinder 22 for each character. on the surface of key-plate 2.

It is also understood that although only one partially punched-out blade (10,1n Figs.

key-plate 2 that an individual one is used for each character.

These blades after being partially cut out and pressed down are turned at a right angle in a direct line with the centers of the characters on the keyboard as well as with the V-shaped slots in cylinder 22 and the corresponding characters at the bottom of cylinder 20.

The universal movement, shown in Fig. 4, has an extra ring 36, and two pivots 37, and may be used in place of that shown in Figs. 1, and 2,, to serve in more fully equalizing the pressure exerted in printing the different characters. I

Other means and other mechanism than those shown, may be used for shiftingthe paper, and I do not claim, in this specification, any particular method for doing so.

I claim:

1. A compound-key typewriter consisting of a universally supported tilting key-plate having downwardly projecting blades, the said key-plate having secured near its center a cut-away downwardly projecting cylinder with type-characters on its lower end; in combination with a second cylinder, limited to vertical movements and having V-shaped punched-out slots around its circumference adapted to. 006 erate individually with the corresponding lades of the before mentioned' key-plate; the whole in combination 7 with a paper-shifting mechanism, and means for bringing the several movable parts to their original positions after. a letter has been printed. 'p

2. A compound-key typewriter consisting ofa central rod carrying a cylinder with V- shaped slots around its circumference, the

upper end of the said'central rod being connected, through the mediumof av universal mechanism, with a tilting key-plate having a downwardly pro'yecting support for typecharacters an a series of downwardly pro j ecting'blades corresponding with the rcfhar- Signed at New York city, in the 'rsolllnty of .acters on the upper surface of the said key- New York and State of New York, this the plate; a tube connected to the base by means 13th day of February, A. D. 1918.

of a supporting arm, in which tube the cen- DAVID JANKDWER. 5 tral rod is arranged to move; the Whole in Witnesses:

combination with paper-shifting and feed J. HART ROBERTSON,

mechanism. BARTON 1B. WARD. 

